Debug and old IRQ

[Fabien Comte]

Hello, When I restart my application with debugger, i have strange IRQs called (TWI, ...) before init. Possibly IRQ still active and debug don't touch them.

Can I disable all IRQ on restart ? Is there a magic cleaning function ? :-)

[Susheel Nuguru]

Hi,

   __disable_irq();

I think this is ARM CMSIS funtion and it will disable all IRQ. This should be ok as you are doing it before enabling softdevice.

[Fabien Comte]

Thank you.

[Fabien Comte]

See that if you get some issues devzone.nordicsemi.com/.../

[Susheel Nuguru]

True, SVC interrupt needs to be enabled before calling sd_softdevice_enable. __disable_irq seems more dangerous than i thought :). Just disable all peripheral interrupts instead

[Fabien Comte]

I did it and i have a CPU that i cannot recover with SWD...

[Fabien Comte]

I propose

// disable all external interrupts
		NVIC->ICER[0] = 0xFFFFFFFF;
		NVIC->ICER[1] = 0xFFFFFFFF;
		NVIC->ICER[2] = 0xFFFFFFFF;
		NVIC->ICER[3] = 0xFFFFFFFF;
		NVIC->ICER[4] = 0xFFFFFFFF;
		NVIC->ICER[5] = 0xFFFFFFFF;
		NVIC->ICER[6] = 0xFFFFFFFF;
		NVIC->ICER[7] = 0xFFFFFFFF;
		
		// clear all external pending interrupts
		NVIC->ICPR[0] = 0xFFFFFFFF;
		NVIC->ICPR[1] = 0xFFFFFFFF;
		NVIC->ICPR[2] = 0xFFFFFFFF;
		NVIC->ICPR[3] = 0xFFFFFFFF;
		NVIC->ICPR[4] = 0xFFFFFFFF;
		NVIC->ICPR[5] = 0xFFFFFFFF;
		NVIC->ICPR[6] = 0xFFFFFFFF;
		NVIC->ICPR[7] = 0xFFFFFFFF;